vi CONTENTS. 



PAGE 



204. Circumstances affecting gastric digestion ; acidity, temporal un . 371 



205. The nature of the action of gastric juice. Pepsin . . . 373 



20(>. The action of gastric juice on gelatine, chondrin &c. . . . 374 

 207. The action of gastric juice on milk. Curdling of milk. Casein. 



Renniu 374 



SECTION II. 

 THE STRUCTURE OF THE SALIVARY GLANDS, THE GASTRIC Mucors MKM- 



BRANE, THE PANCREAS AND THE (Es< .ni.\< . 



208. The general plan of structure of the alimentary canal ; mucous, sub- 

 mucous, and muscular coats . 377 

 209. The general nature of glands . . 379 



Structure of the Stom<x-h. 



210. General structure of the stomach 380 



211. The cardiac glands 381 



212. The central or chief cells. The parietal or ovoid colls . . . 



213. The connective tissue of the mucous membrane . . . . 



'214. The pyloric glands .... . .384 



Tin- St.ttti-a/\>/ <il'iinlx. 



215. The general structure of a salivary gland 385 



216. The characters of mucous cells 387 



217. The structure of the ducts . . . ... 388 



218. The structure of albuminous salivary glands ;;s'.i 



219. The nervous supply of the salivary glands 390 



The Pancreas. 

 220. The structure of the pancreas ... ... 390 



The (Esophagus. 



221. The general plan of structure of the oesophagus. The mucous and 



submucous coats 392 



222. The muscles of the oesophagus 393 



223. The nervous supply of the oesophagus . . ... 394 



SECTION III. 



THE ACT OF SECRETION OF SALIVA AND GASTRIC JUICE AND THE NERVOUS 

 MECHAM-MS WHICH REGULATE IT. 



224. The evidences of the existence of a nervous mechanism . . . 395 



225. The nerves of the submaxillary gland 396 



226. The reflex secretion of saliva by means of the chorda tympani 



nerve . .... 396 



